Warp stop-motion for looms for weaving.



No. 854,167. PATENTED MAY 21, 1907.

n.- M. HOLLINS. WARP STOP MOTION FOR LOOMS FOR WEAVING,

APPLICATION I'ILBID-I'EB.2,1907.

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1n: Nun'ms PETERS ca WASHINGTON, 17 c.

threads may be broken by reason of the ac UNITED STATES PATENT OFFICE.

DENIS M. I-IOLLINS, OF BLACKBURN, ENGLAND, ASSIGN OR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP STOP-MOTION FOR LOOIVIS FOR WEAVING.

To a, whom it may concern Be it known that I, DENIS MAoHELL H01.- LINS, a subject of King Edward VII of Great Britain, and a resident of Blackburn, England, have invented certain new and useful Improvements in or Appertaining'to Warp Stop-Motions for Looms for Weaving, of which the following description, in connection with the accompanying drawings, is a specification.

This invention has reference to warp stop motions for bringing about the stoppage of the loom on the breakage or failure of an end or ends of warp, and particularly to what are known as the single thread warp stop motions in which drop wires or detectors are suspended on or supported by individual warp threads at a point away from or behind the healds and form no part of the shed forming devices.

With the exception .of the vertical reciprocation given to the drop wires by the movement of the respective warp threads in the formation of the shed, or of the vertical downward movement when released, the drop wires retain a fixed position in the loom, the warp threads passing freely in a longitudinal direction through the eyelets or openings in the drop wires. There is a serious drawback to this motion in that, through the beating up of the lay, the warp threads are moved backward and forward through the eyelets in the drop wires and, consequently, there is con siderable friction or rubbing and fretting of the warp threads against the walls of the. eyelets which weaken such threads and in many instances causes their breakage, or the cumulations of lint or fluff in the openings or eyelets.

The object of my invention is to overcome the objectionable rubbing action on the warp threads by their to and fro motion through the openings in the drop wires and minimize liability of accidental and unnecessary breakage of same, and for thispurpose my invention consists in establishing a connection or connections between the vibrator or whip roll or equivalent part at the rear of theloom over which, or the bearing surface supported thereby, the warp threads pass from the warp beam and which vibrates with the pull or tension of the Warp, and the stop motion 1 Patented May 21, 1907.

1907. Serial No. 355,350.

box or casing in which the drop wires or de tectors are located, or the side frames supporting the transverse rods if the detectors are held captive on rods passing through elongated openings in the drop wires, such connection or connections comprising a-rod or rods, links or like connectors. By such means the vibratory movement of the vibrator or whip roll with the to and fro motion of the warp will similarly vibrate the stop motion box or framing and thus move the drop wires or detectors bodily forward and backward at the same time as the warp, whereby the rubbing of the warp threads on the edges of the openings in the drop wires is avoided and fretting of the yarn and breakages arising therefrom or from accumulations of lint or flufl prevented. Ordinarily the drop wires or detectors are arranged in two banks or series and the vibrating wiper or means for engaging a released detector will operate as usual whether the detectors are vibrating at the time of release or are in normal position.

In the accompanying drawings :--Figure 1 is cross section looking in the direction of arrow A Fig. 2, of so much of the rear of a loom as is essential to show the application of my improvements; Fig. 2 is a plan view of the parts shown in Fig. 1, the lever and cam for actuating the whip roll or back bearer being omitted, and Fig. 3 is a sectional elevation, similar to Fig. 1, showing the parts in different positions.

Referring to the drawings, letter a represents the whip roll or back bearer which in this instance is vibrated or oscillated periodically by the cam b on shaft 1) acting on the free end of an arm or lever 0 connected to the stud on which the back bearer or vibrator a is mounted. The mounting of the back bearer or vibrator a and the actuation of it by lever and cam or other means and by the tension of the warp thereon may be as ordinary and forms no part of the present invention.

(1 represents the ordinary stop motion box which in this instance is slidably supported at each end on brackets such as e bolted to the frame fof the loom so that according to my invention the said box may be free to slide bodily to and fro on said brackets within the limits of slots such as 0.

Within the stop motion box (Z are located the lower ends of the drop wires or detectors 9 which are free to move vertically within the limits of elongated slots 9 in the upper ends of same through which pass rods or bars h in the ordinary way. The warp threads pass from the warp beam (not shown) over the vibrator or whip roll a and are then separated into two series and threaded through respective banks of drop wires or detectors 9.

In conjunction with a movable stop motion box d my invention consists in coupling the said box with the back bearer or vibrator a in order that the vibratory movementsof the said vibrator may be communicated to the stop motion box to move it forwardly and backwardly in unison with the forward and backward movement of the warp other than the normal forward traverse of the warp as taken up in weaving. At each end of the stop motion box (1 is pivotally secured on a stud, as i, a rod or link is whose opposite end passes loosely through a bearing in a lug or bracket Z secured to the back bearer a. Secured to the rod or link 7c on each side of the lug or bracket Z are collars m which engage with the bracket Z according to the direction of its movement and cause the rod k to move in the same direction. The bearings in the brackets Z are rounded to give freedom for the angular movement of the brackets with the whip roll.

The vibratory movement of the vibrator or whip roll a with the to and fro motion of the warp, vibrates the stop motion box d to the same extent and in the same direction and thus moves the drop wiresor detectors bodily forward and backward at the same time as the warp, by which means the rubbing of the warp threads on the edges of the eyelets in the drop wires is avoided or minimized and fretting of the yarn and breakages arising therefrom or from accumulations of lint or fluff prevented. The connection between the vibrator or whip roll a and the stop motion box (1 or its equivalent may be made in any suitable manner and means of adjustment may be provided if desired. In the example shown in the drawings, adjustment may be made by releasing and moving the collars m endwise on the rod or link k toward or from the bracket Z. The connection of the sto -motion box 61 with the whiproll or back earer a is preferred for the reason that any movement of the whip roll under the pull or tension of the warp will be communicated to the stop motion box.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In warp stop-motions having drop wires or detectors, a slidably supported stopmotion box in which the lower ends of the detectors are located and confined, a backbearer, and a rod coupling the said stop-motion box with the back-bearer to effect positive sliding movement of the stop-motion box in unison with the back and forth movement of the warp.

2. In warp stop-motions having vertically movable detectors, a slidably supported stop-motion box in which the lower ends of the detectors are located and confined, a vibrating back bearer, a rod coupling the backbearer with the stop-motion box, to positively slide the latter backward and forward in unison with the back and forth movement of the warp, and an adjustable connection between the coupling and the back-bearer, adjustment of the connection varying the extent of movement of the stop-motion box.

3. In warp stop-motions having drop wires or detectors, a slidably supported stopmotion box in which the lower ends of the detectors are located and alined, a back-bearer, an apertured lug secured thereto, a rod connected at one end with the stop-motion box and having its other end extended loosely through the lug on the back-bearer, and collars adjustably secured on the rod on opposite sides of the lug, vibration of the backbearer acting through the rod to effect positive sliding movement of the stop-motion box in unison with the back and forth movement of the warp.

In testimony whereof I affix my signature in the presence of two witnesses.

DENIS M. HOLLINS. Witnesses:

H. CHADwIcK, E. CALLIs. 

